Comparison 7. Nicotine EC + NRT versus non‐nicotine EC + NRT.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
7.1 Smoking cessation	2	1039	Risk Ratio (M‐H, Fixed, 95% CI)	1.77 [1.07, 2.94]
7.2 Adverse events	1		Risk Ratio (M‐H, Fixed, 95% CI)	Totals not selected
7.2.1 12 weeks	1		Risk Ratio (M‐H, Fixed, 95% CI)	Totals not selected
7.3 Serious adverse events	1		Risk Ratio (M‐H, Fixed, 95% CI)	Totals not selected
7.3.1 6 months	1		Risk Ratio (M‐H, Fixed, 95% CI)	Totals not selected
7.4 Carbon monoxide (ppm)	1		Mean Difference (IV, Fixed, 95% CI)	Totals not selected
7.4.1 8 weeks	1		Mean Difference (IV, Fixed, 95% CI)	Totals not selected
7.5 FeNO (ppb)	1		Mean Difference (IV, Fixed, 95% CI)	Totals not selected
7.5.1 6 months	1		Mean Difference (IV, Fixed, 95% CI)	Totals not selected
7.6 FEV1 (%)	1		Mean Difference (IV, Fixed, 95% CI)	Totals not selected
7.6.1 6 months	1		Mean Difference (IV, Fixed, 95% CI)	Totals not selected
7.7 FVC (%)	1		Mean Difference (IV, Fixed, 95% CI)	Totals not selected
7.7.1 6 months	1		Mean Difference (IV, Fixed, 95% CI)	Totals not selected